Usually if someone was to change a part of their major or they want to make their skills more specific than it is usually too late after they complete their degree. That is not to say that they can’t add on more education but they would have to either attend college or take some classes in order to get that skill added on.
Before you finish college you need to determine if you’ve taken all of the classes and you’re on the right track to get the degree that you want. If not it is almost too late unless you’re willing to get more education. Sometimes the company will offer training in certain parts of the job and this may help you get the skills that you’re wanting without going to college.